Change from baseline in forced expiratory volume in one second(% pred) over 7 months and by treatment group in patients aged ≥14 yrs#
| Baseline | 1 month¶ | 3 months¶ | 6 months¶ | 7 months¶ | |
| Daily+ | 53.8±19.3 | 2.9±0.8* | 3.2±0.8* | 2.4±0.8* | 0.4–0.9 |
| Weekly§ | 53.2±21.3 | 2.5±0.8* | 2.1±0.7* | 2.3±0.9* | 1.8–0.9* |
| Mean differenceƒ | −0.6 | −0.4 | −1.1 | −0.1 | +1.4 |
| 95% CI | −5.87–7.05 | −1.89–2.54 | −1.07–3.17 | −2.28–2.37 | −3.9–1.08 |
| p-value## | 0.77 | 0.33 | 0.97 | 0.26 |
Data are presented as mean±sd, unless otherwise stated. CI: confidence interval. #: n = 154; ¶: change compared with baseline; +: n = 79; §: n = 75; ƒ: mean difference between groups (daily versus weekly); ##: p-values relate to mean difference between groups (daily versus weekly); *: significant difference (p<0.05) from baseline.